Hello, I currently receive this notification upon upgrading nixos-unstable channel :

error: builder for '/nix/store/9q48x7j70bpvmnwy424pc90sq1cchcqx-tailscale-1.86.5.drv' failed with exit code 1;
       last 25 log lines:
       > ok      tailscale.com/net/socks5        0.008s
       > ?        tailscale.com/net/sockstats     [no test files]
       > ok      tailscale.com/net/speedtest     10.015s
       > ok      tailscale.com/net/stun  0.007s
       > ?        tailscale.com/net/stun/stuntest [no test files]
       > ok      tailscale.com/net/stunserver    0.004s
       > ok       tailscale.com/net/tcpinfo       0.045s
       > ok       tailscale.com/net/tlsdial       0.607s
       > ok       tailscale.com/net/tlsdial/blockblame    0.004s
       > ok       tailscale.com/net/tsaddr        0.010s
       > ok       tailscale.com/net/tsdial        0.006s
       > ok       tailscale.com/net/tshttpproxy   0.011s
       > ok       tailscale.com/net/tstun 0.017s
       > ok       tailscale.com/net/udprelay      0.207s
       > ok       tailscale.com/net/udprelay/endpoint     0.008s
       > ok       tailscale.com/packages/deb      0.015s
       > --- FAIL: TestGetList (0.00s)
       >     portlist_test.go:19: seek /proc/net/tcp: illegal seek
       > --- FAIL: TestIgnoreLocallyBoundPorts (0.00s)
       >     portlist_test.go:40: seek /proc/net/tcp: illegal seek
       > --- FAIL: TestPoller (0.00s)
       >     portlist_test.go:61: seek /proc/net/tcp: illegal seek
       > FAIL
       > FAIL tailscale.com/portlist  0.009s
       > FAIL
       For full logs, run:
         nix log /nix/store/9q48x7j70bpvmnwy424pc90sq1cchcqx-tailscale-1.86.5.drv
error: 1 dependencies of derivation '/nix/store/d2bj4984ag0fcnrdis8c57m50114lafg-system-generators.drv' failed to build
error: 1 dependencies of derivation '/nix/store/9kmkxpm0ai0ysxyjnpmxc19d92nvkv9s-system-path.drv' failed to build
error: 1 dependencies of derivation '/nix/store/wmm9dymzar3wpz3n9nh7v7ac4x62gc7m-nixos-system-3nnoia-25.11.20250912.ad4e6dd.drv' failed to build
Traceback (most recent call last):
  File "/nix/store/dbh61pdd78k5i4yckfvs16lsxr8k7k66-nixos-rebuild-ng-0.0.0/lib/python3.13/site-packages/nixos_rebuild/__init__.py", line 364, in main
    execute(sys.argv)

went throught, just now :

debug: nixos_rebuild.process: calling run with args=['nix-channel', '--update', 'nixos'], kwargs={}, extra_env=None
unpacking 1 channels...
debug: nixos_rebuild.process: calling run with args=['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '--print-out-paths', '/etc/nixos#nixosConfigurations."my-nixos".config.system.build.nixos-rebuild', '-v', '--show-trace', '--no-link'], kwargs={'stdout': -1}, extra_env=None
debug: nixos_rebuild.process: captured output with stdout='/nix/store/dbh61pdd78k5i4yckfvs16lsxr8k7k66-nixos-rebuild-ng-0.0.0\n', stderr=None
building the system configuration...
debug: nixos_rebuild.process: calling run with args=['nix', '--extra-experimental-features', 'nix-command flakes', 'build', '--print-out-paths', '/etc/nixos#nixosConfigurations."my-nixos".config.system.build.toplevel', '-v', '--show-trace', '--no-link'], kwargs={'stdout': -1}, extra_env=None
these 4 derivations will be built:
  /nix/store/9q48x7j70bpvmnwy424pc90sq1cchcqx-tailscale-1.86.5.drv
  /nix/store/06a3vzvz79paizziiavxkjr5kn82rx2q-user-environment.drv
  /nix/store/ga913pjr24md3z5sjw0lp0alxx4p76nn-etc.drv
  /nix/store/yv8yslywrgbwi3ca1zksqarsn8bfrs0a-nixos-system-3nnoia-25.11.20250912.ad4e6dd.drv
these 7 paths will be fetched (55.93 MiB download, 325.35 MiB unpacked):
  /nix/store/3fd683jfggglpshxprz9mi5sz8wd3c9p-go-1.25.0
  /nix/store/0mi9h8h8k3djr1fih4j77psdcxlsizrv-install-shell-files
  /nix/store/lgn3v7prgva6rd6df3a3g0w2qd40dmyj-source
  /nix/store/jrw7q6v8q74hhv43zgpq7i4jmxj9nwlj-stdenv-linux
  /nix/store/k3vijb9xjxafamh283shfklv4h74dsmr-tailscale-1.86.5-go-modules
  /nix/store/8lncn446frni7q5m8vpvrvpv53x0ldlb-tailscale-systray-2022-10-19
  /nix/store/8bg89df6kys3w7gg289akgkj2bly3g56-tailscalesd-0.3.0
copying path '/nix/store/8bg89df6kys3w7gg289akgkj2bly3g56-tailscalesd-0.3.0' from 'https://cache.nixos.org'...
copying path '/nix/store/8lncn446frni7q5m8vpvrvpv53x0ldlb-tailscale-systray-2022-10-19' from 'https://cache.nixos.org'...
copying path '/nix/store/0mi9h8h8k3djr1fih4j77psdcxlsizrv-install-shell-files' from 'https://cache.nixos.org'...
copying path '/nix/store/lgn3v7prgva6rd6df3a3g0w2qd40dmyj-source' from 'https://cache.nixos.org'...
copying path '/nix/store/k3vijb9xjxafamh283shfklv4h74dsmr-tailscale-1.86.5-go-modules' from 'https://cache.nixos.org'...
copying path '/nix/store/3fd683jfggglpshxprz9mi5sz8wd3c9p-go-1.25.0' from 'https://cache.nixos.org'...
copying path '/nix/store/jrw7q6v8q74hhv43zgpq7i4jmxj9nwlj-stdenv-linux' from 'https://cache.nixos.org'...
building '/nix/store/9q48x7j70bpvmnwy424pc90sq1cchcqx-tailscale-1.86.5.drv'...
building '/nix/store/06a3vzvz79paizziiavxkjr5kn82rx2q-user-environment.drv'...
building '/nix/store/ga913pjr24md3z5sjw0lp0alxx4p76nn-etc.drv'...
building '/nix/store/yv8yslywrgbwi3ca1zksqarsn8bfrs0a-nixos-system-3nnoia-25.11.20250912.ad4e6dd.drv'...
debug: nixos_rebuild.process: captured output with stdout='/nix/store/z69sxz8ax7qg51pln8jydvv8fxw9rjmg-nixos-system-3nnoia-25.11.20250912.ad4e6dd\n', stderr=None
debug: nixos_rebuild.process: calling run with args=['test', '-f', PosixPath('/nix/store/z69sxz8ax7qg51pln8jydvv8fxw9rjmg-nixos-system-3nnoia-25.11.20250912.ad4e6dd/nixos-version')], kwargs={}, extra_env=None
debug: nixos_rebuild.process: calling run with args=['nix-env', '-p', PosixPath('/nix/var/nix/profiles/system'), '--set', PosixPath('/nix/store/z69sxz8ax7qg51pln8jydvv8fxw9rjmg-nixos-system-3nnoia-25.11.20250912.ad4e6dd')], kwargs={}, extra_env=None
debug: nixos_rebuild.process: calling run with args=['test', '-d', '/run/systemd/system'], kwargs={}, extra_env=None
debug: nixos_rebuild.process: calling run with args=['systemd-run', '-E', 'LOCALE_ARCHIVE', '-E', 'NIXOS_INSTALL_BOOTLOADER', '--collect', '--no-ask-password', '--pipe', '--quiet', '--service-type=exec', '--unit=nixos-rebuild-switch-to-configuration', PosixPath('/nix/store/z69sxz8ax7qg51pln8jydvv8fxw9rjmg-nixos-system-3nnoia-25.11.20250912.ad4e6dd/bin/switch-to-configuration'), 'switch'], kwargs={}, extra_env={'NIXOS_INSTALL_BOOTLOADER': '0'}
activating the configuration...
setting up /etc...
reloading user units for omakuva...
restarting sysinit-reactivation.target
the following new units were started: NetworkManager-dispatcher.service
Done. The new configuration is /nix/store/z69sxz8ax7qg51pln8jydvv8fxw9rjmg-nixos-system-3nnoia-25.11.20250912.ad4e6dd```